There is no known product that has been proven to prevent head lice. Anyone can get head lice. It has nothing to do with social status or cleanliness. It's simply being at the wrong place at the wrong time.
Copyright 2006
Lice Removal Solutions
To reduce your risk encourage all family members to:
Wear their hair up at school or work.
Don't share hats, helmets, combs or brushes.
Use your own sleeping bag and pillow at sleep-overs.